| Message ID | 20230913163823.7880-19-james.morse@arm.com (mailing list archive) |
|---|---|
| State | RFC, archived |
| Headers | show |
| Series | ACPI/arm64: add support for virtual cpuhotplug | expand |
On 9/14/23 02:38, James Morse wrote: > The code behind ACPI_HOTPLUG_CPU allows a not-present CPU to become > present. This isn't the only use of HOTPLUG_CPU. On arm64 and riscv > CPUs can be taken offline as a power saving measure. > > On arm64 an offline CPU may be disabled by firmware, preventing it from > being brought back online, but it remains present throughout. > > Adding code to prevent user-space trying to online these disabled CPUs > needs some additional terminology. > > Rename the Kconfig symbol CONFIG_ACPI_HOTPLUG_PRESENT_CPU to reflect > that it makes possible CPUs present. > > HOTPLUG_CPU is untouched as this is only about the ACPI mechanism. > > Signed-off-by: James Morse <james.morse@arm.com> > --- > arch/ia64/Kconfig | 2 +- > arch/ia64/include/asm/acpi.h | 2 +- > arch/ia64/kernel/acpi.c | 6 +++--- > arch/ia64/kernel/setup.c | 2 +- > arch/loongarch/configs/loongson3_defconfig | 2 +- > arch/loongarch/kernel/acpi.c | 4 ++-- > arch/x86/Kconfig | 2 +- > arch/x86/kernel/acpi/boot.c | 4 ++-- > drivers/acpi/Kconfig | 4 ++-- > drivers/acpi/acpi_processor.c | 10 +++++----- > include/acpi/processor.h | 2 +- > include/linux/acpi.h | 6 +++--- > 12 files changed, 23 insertions(+), 23 deletions(-) > The replacement is missed for arch/loongarch. [gshan@gshan l]$ git grep ACPI_HOTPLUG_CPU arch/loongarch/Kconfig: select ACPI_HOTPLUG_CPU if ACPI_PROCESSOR && HOTPLUG_CPU > diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig > index a3bfd42467ab..54972f9fe804 100644 > --- a/arch/ia64/Kconfig > +++ b/arch/ia64/Kconfig > @@ -16,7 +16,7 @@ config IA64 > select ARCH_MIGHT_HAVE_PC_PARPORT > select ARCH_MIGHT_HAVE_PC_SERIO > select ACPI > - select ACPI_HOTPLUG_CPU if ACPI_PROCESSOR && HOTPLUG_CPU > + select ACPI_HOTPLUG_PRESENT_CPU if ACPI_PROCESSOR && HOTPLUG_CPU > select ACPI_NUMA if NUMA > select ARCH_ENABLE_MEMORY_HOTPLUG > select ARCH_ENABLE_MEMORY_HOTREMOVE > diff --git a/arch/ia64/include/asm/acpi.h b/arch/ia64/include/asm/acpi.h > index 58500a964238..482ea994d1e1 100644 > --- a/arch/ia64/include/asm/acpi.h > +++ b/arch/ia64/include/asm/acpi.h > @@ -52,7 +52,7 @@ extern unsigned int is_cpu_cpei_target(unsigned int cpu); > extern void set_cpei_target_cpu(unsigned int cpu); > extern unsigned int get_cpei_target_cpu(void); > extern void prefill_possible_map(void); > -#ifdef CONFIG_ACPI_HOTPLUG_CPU > +#ifdef CONFIG_ACPI_HOTPLUG_PRESENT_CPU > extern int additional_cpus; > #else > #define additional_cpus 0 > diff --git a/arch/ia64/kernel/acpi.c b/arch/ia64/kernel/acpi.c > index 15f6cfddcc08..35881bf4b016 100644 > --- a/arch/ia64/kernel/acpi.c > +++ b/arch/ia64/kernel/acpi.c > @@ -194,7 +194,7 @@ acpi_parse_plat_int_src(union acpi_subtable_headers * header, > return 0; > } > > -#ifdef CONFIG_HOTPLUG_CPU > +#ifdef CONFIG_ACPI_HOTPLUG_PRESENT_CPU > unsigned int can_cpei_retarget(void) > { > extern int cpe_vector; > @@ -711,7 +711,7 @@ int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi) > /* > * ACPI based hotplug CPU support > */ > -#ifdef CONFIG_ACPI_HOTPLUG_CPU > +#ifdef CONFIG_ACPI_HOTPLUG_PRESENT_CPU > int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid) > { > #ifdef CONFIG_ACPI_NUMA > @@ -820,7 +820,7 @@ int acpi_unmap_cpu(int cpu) > return (0); > } > EXPORT_SYMBOL(acpi_unmap_cpu); > -#endif /* CONFIG_ACPI_HOTPLUG_CPU */ > +#endif /* CONFIG_ACPI_HOTPLUG_PRESENT_CPU */ > > #ifdef CONFIG_ACPI_NUMA > static acpi_status acpi_map_iosapic(acpi_handle handle, u32 depth, > diff --git a/arch/ia64/kernel/setup.c b/arch/ia64/kernel/setup.c > index 5a55ac82c13a..44591716d07b 100644 > --- a/arch/ia64/kernel/setup.c > +++ b/arch/ia64/kernel/setup.c > @@ -569,7 +569,7 @@ setup_arch (char **cmdline_p) > #ifdef CONFIG_ACPI_NUMA > acpi_numa_init(); > acpi_numa_fixup(); > -#ifdef CONFIG_ACPI_HOTPLUG_CPU > +#ifdef CONFIG_ACPI_HOTPLUG_PRESENT_CPU > prefill_possible_map(); > #endif > per_cpu_scan_finalize((cpumask_empty(&early_cpu_possible_map) ? > diff --git a/arch/loongarch/configs/loongson3_defconfig b/arch/loongarch/configs/loongson3_defconfig > index a3b52aaa83b3..ef3bc76313e4 100644 > --- a/arch/loongarch/configs/loongson3_defconfig > +++ b/arch/loongarch/configs/loongson3_defconfig > @@ -59,7 +59,7 @@ CONFIG_ACPI_SPCR_TABLE=y > CONFIG_ACPI_TAD=y > CONFIG_ACPI_DOCK=y > CONFIG_ACPI_IPMI=m > -CONFIG_ACPI_HOTPLUG_CPU=y > +CONFIG_ACPI_HOTPLUG_PRESENT_CPU=y > CONFIG_ACPI_PCI_SLOT=y > CONFIG_ACPI_HOTPLUG_MEMORY=y > CONFIG_EFI_ZBOOT=y > diff --git a/arch/loongarch/kernel/acpi.c b/arch/loongarch/kernel/acpi.c > index 9450e09073eb..b5153e395ad9 100644 > --- a/arch/loongarch/kernel/acpi.c > +++ b/arch/loongarch/kernel/acpi.c > @@ -289,7 +289,7 @@ void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size) > memblock_reserve(addr, size); > } > > -#ifdef CONFIG_ACPI_HOTPLUG_CPU > +#ifdef CONFIG_ACPI_HOTPLUG_PRESENT_CPU > > #include <acpi/processor.h> > > @@ -341,4 +341,4 @@ int acpi_unmap_cpu(int cpu) > } > EXPORT_SYMBOL(acpi_unmap_cpu); > > -#endif /* CONFIG_ACPI_HOTPLUG_CPU */ > +#endif /* CONFIG_ACPI_HOTPLUG_PRESENT_CPU */ > diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig > index 133ea5f561b5..295a7a3debb6 100644 > --- a/arch/x86/Kconfig > +++ b/arch/x86/Kconfig > @@ -60,7 +60,7 @@ config X86 > # > select ACPI_LEGACY_TABLES_LOOKUP if ACPI > select ACPI_SYSTEM_POWER_STATES_SUPPORT if ACPI > - select ACPI_HOTPLUG_CPU if ACPI_PROCESSOR && HOTPLUG_CPU > + select ACPI_HOTPLUG_PRESENT_CPU if ACPI_PROCESSOR && HOTPLUG_CPU > select ARCH_32BIT_OFF_T if X86_32 > select ARCH_CLOCKSOURCE_INIT > select ARCH_CORRECT_STACKTRACE_ON_KRETPROBE > diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c > index 2a0ea38955df..84dd4133754b 100644 > --- a/arch/x86/kernel/acpi/boot.c > +++ b/arch/x86/kernel/acpi/boot.c > @@ -814,7 +814,7 @@ static void __init acpi_set_irq_model_ioapic(void) > /* > * ACPI based hotplug support for CPU > */ > -#ifdef CONFIG_ACPI_HOTPLUG_CPU > +#ifdef CONFIG_ACPI_HOTPLUG_PRESENT_CPU > #include <acpi/processor.h> > > static int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid) > @@ -863,7 +863,7 @@ int acpi_unmap_cpu(int cpu) > return (0); > } > EXPORT_SYMBOL(acpi_unmap_cpu); > -#endif /* CONFIG_ACPI_HOTPLUG_CPU */ > +#endif /* CONFIG_ACPI_HOTPLUG_PRESENT_CPU */ > > int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base) > { > diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig > index 8456d48ba702..417f9f3077d2 100644 > --- a/drivers/acpi/Kconfig > +++ b/drivers/acpi/Kconfig > @@ -305,7 +305,7 @@ config ACPI_IPMI > To compile this driver as a module, choose M here: > the module will be called as acpi_ipmi. > > -config ACPI_HOTPLUG_CPU > +config ACPI_HOTPLUG_PRESENT_CPU > bool > depends on ACPI_PROCESSOR && HOTPLUG_CPU > select ACPI_CONTAINER > @@ -399,7 +399,7 @@ config ACPI_PCI_SLOT > > config ACPI_CONTAINER > bool "Container and Module Devices" > - default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_CPU) > + default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_PRESENT_CPU) > help > This driver supports ACPI Container and Module devices (IDs > ACPI0004, PNP0A05, and PNP0A06). > diff --git a/drivers/acpi/acpi_processor.c b/drivers/acpi/acpi_processor.c > index 867782bc50b0..75257fae10e7 100644 > --- a/drivers/acpi/acpi_processor.c > +++ b/drivers/acpi/acpi_processor.c > @@ -182,7 +182,7 @@ static void __init acpi_pcc_cpufreq_init(void) {} > #endif /* CONFIG_X86 */ > > /* Initialization */ > -#ifdef CONFIG_ACPI_HOTPLUG_CPU > +#ifdef CONFIG_ACPI_HOTPLUG_PRESENT_CPU > static int acpi_processor_hotadd_init(struct acpi_processor *pr) > { > unsigned long long sta; > @@ -227,7 +227,7 @@ static inline int acpi_processor_hotadd_init(struct acpi_processor *pr) > { > return -ENODEV; > } > -#endif /* CONFIG_ACPI_HOTPLUG_CPU */ > +#endif /* CONFIG_ACPI_HOTPLUG_PRESENT_CPU */ > > static int acpi_processor_get_info(struct acpi_device *device) > { > @@ -461,7 +461,7 @@ static int acpi_processor_add(struct acpi_device *device, > return result; > } > > -#ifdef CONFIG_ACPI_HOTPLUG_CPU > +#ifdef CONFIG_ACPI_HOTPLUG_PRESENT_CPU > /* Removal */ > static void acpi_processor_remove(struct acpi_device *device) > { > @@ -505,7 +505,7 @@ static void acpi_processor_remove(struct acpi_device *device) > free_cpumask_var(pr->throttling.shared_cpu_map); > kfree(pr); > } > -#endif /* CONFIG_ACPI_HOTPLUG_CPU */ > +#endif /* CONFIG_ACPI_HOTPLUG_PRESENT_CPU */ > > #ifdef CONFIG_ARCH_MIGHT_HAVE_ACPI_PDC > bool __init processor_physically_present(acpi_handle handle) > @@ -630,7 +630,7 @@ static const struct acpi_device_id processor_device_ids[] = { > static struct acpi_scan_handler processor_handler = { > .ids = processor_device_ids, > .attach = acpi_processor_add, > -#ifdef CONFIG_ACPI_HOTPLUG_CPU > +#ifdef CONFIG_ACPI_HOTPLUG_PRESENT_CPU > .detach = acpi_processor_remove, > #endif > .hotplug = { > diff --git a/include/acpi/processor.h b/include/acpi/processor.h > index 94181fe9780a..fd6913370c72 100644 > --- a/include/acpi/processor.h > +++ b/include/acpi/processor.h > @@ -465,7 +465,7 @@ extern int acpi_processor_ffh_lpi_probe(unsigned int cpu); > extern int acpi_processor_ffh_lpi_enter(struct acpi_lpi_state *lpi); > #endif > > -#ifdef CONFIG_ACPI_HOTPLUG_CPU > +#ifdef CONFIG_ACPI_HOTPLUG_PRESENT_CPU > extern int arch_register_cpu(int cpu); > extern void arch_unregister_cpu(int cpu); > #endif > diff --git a/include/linux/acpi.h b/include/linux/acpi.h > index a73246c3c35e..651dd43976a9 100644 > --- a/include/linux/acpi.h > +++ b/include/linux/acpi.h > @@ -316,12 +316,12 @@ static inline int acpi_processor_evaluate_cst(acpi_handle handle, u32 cpu, > } > #endif > > -#ifdef CONFIG_ACPI_HOTPLUG_CPU > +#ifdef CONFIG_ACPI_HOTPLUG_PRESENT_CPU > /* Arch dependent functions for cpu hotplug support */ > int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, u32 acpi_id, > int *pcpu); > int acpi_unmap_cpu(int cpu); > -#endif /* CONFIG_ACPI_HOTPLUG_CPU */ > +#endif /* CONFIG_ACPI_HOTPLUG_PRESENT_CPU */ > > #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC > int acpi_get_ioapic_id(acpi_handle handle, u32 gsi_base, u64 *phys_addr); > @@ -644,7 +644,7 @@ static inline u32 acpi_osc_ctx_get_cxl_control(struct acpi_osc_context *context) > #define ACPI_GSB_ACCESS_ATTRIB_RAW_PROCESS 0x0000000F > > /* Enable _OST when all relevant hotplug operations are enabled */ > -#if defined(CONFIG_ACPI_HOTPLUG_CPU) && \ > +#if defined(CONFIG_ACPI_HOTPLUG_PRESENT_CPU) && \ > defined(CONFIG_ACPI_HOTPLUG_MEMORY) && \ > defined(CONFIG_ACPI_CONTAINER) > #define ACPI_HOTPLUG_OST Thanks, Gavin
diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig index a3bfd42467ab..54972f9fe804 100644 --- a/arch/ia64/Kconfig +++ b/arch/ia64/Kconfig @@ -16,7 +16,7 @@ config IA64 select ARCH_MIGHT_HAVE_PC_PARPORT select ARCH_MIGHT_HAVE_PC_SERIO select ACPI - select ACPI_HOTPLUG_CPU if ACPI_PROCESSOR && HOTPLUG_CPU + select ACPI_HOTPLUG_PRESENT_CPU if ACPI_PROCESSOR && HOTPLUG_CPU select ACPI_NUMA if NUMA select ARCH_ENABLE_MEMORY_HOTPLUG select ARCH_ENABLE_MEMORY_HOTREMOVE diff --git a/arch/ia64/include/asm/acpi.h b/arch/ia64/include/asm/acpi.h index 58500a964238..482ea994d1e1 100644 --- a/arch/ia64/include/asm/acpi.h +++ b/arch/ia64/include/asm/acpi.h @@ -52,7 +52,7 @@ extern unsigned int is_cpu_cpei_target(unsigned int cpu); extern void set_cpei_target_cpu(unsigned int cpu); extern unsigned int get_cpei_target_cpu(void); extern void prefill_possible_map(void); -#ifdef CONFIG_ACPI_HOTPLUG_CPU +#ifdef CONFIG_ACPI_HOTPLUG_PRESENT_CPU extern int additional_cpus; #else #define additional_cpus 0 diff --git a/arch/ia64/kernel/acpi.c b/arch/ia64/kernel/acpi.c index 15f6cfddcc08..35881bf4b016 100644 --- a/arch/ia64/kernel/acpi.c +++ b/arch/ia64/kernel/acpi.c @@ -194,7 +194,7 @@ acpi_parse_plat_int_src(union acpi_subtable_headers * header, return 0; } -#ifdef CONFIG_HOTPLUG_CPU +#ifdef CONFIG_ACPI_HOTPLUG_PRESENT_CPU unsigned int can_cpei_retarget(void) { extern int cpe_vector; @@ -711,7 +711,7 @@ int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi) /* * ACPI based hotplug CPU support */ -#ifdef CONFIG_ACPI_HOTPLUG_CPU +#ifdef CONFIG_ACPI_HOTPLUG_PRESENT_CPU int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid) { #ifdef CONFIG_ACPI_NUMA @@ -820,7 +820,7 @@ int acpi_unmap_cpu(int cpu) return (0); } EXPORT_SYMBOL(acpi_unmap_cpu); -#endif /* CONFIG_ACPI_HOTPLUG_CPU */ +#endif /* CONFIG_ACPI_HOTPLUG_PRESENT_CPU */ #ifdef CONFIG_ACPI_NUMA static acpi_status acpi_map_iosapic(acpi_handle handle, u32 depth, diff --git a/arch/ia64/kernel/setup.c b/arch/ia64/kernel/setup.c index 5a55ac82c13a..44591716d07b 100644 --- a/arch/ia64/kernel/setup.c +++ b/arch/ia64/kernel/setup.c @@ -569,7 +569,7 @@ setup_arch (char **cmdline_p) #ifdef CONFIG_ACPI_NUMA acpi_numa_init(); acpi_numa_fixup(); -#ifdef CONFIG_ACPI_HOTPLUG_CPU +#ifdef CONFIG_ACPI_HOTPLUG_PRESENT_CPU prefill_possible_map(); #endif per_cpu_scan_finalize((cpumask_empty(&early_cpu_possible_map) ? diff --git a/arch/loongarch/configs/loongson3_defconfig b/arch/loongarch/configs/loongson3_defconfig index a3b52aaa83b3..ef3bc76313e4 100644 --- a/arch/loongarch/configs/loongson3_defconfig +++ b/arch/loongarch/configs/loongson3_defconfig @@ -59,7 +59,7 @@ CONFIG_ACPI_SPCR_TABLE=y CONFIG_ACPI_TAD=y CONFIG_ACPI_DOCK=y CONFIG_ACPI_IPMI=m -CONFIG_ACPI_HOTPLUG_CPU=y +CONFIG_ACPI_HOTPLUG_PRESENT_CPU=y CONFIG_ACPI_PCI_SLOT=y CONFIG_ACPI_HOTPLUG_MEMORY=y CONFIG_EFI_ZBOOT=y diff --git a/arch/loongarch/kernel/acpi.c b/arch/loongarch/kernel/acpi.c index 9450e09073eb..b5153e395ad9 100644 --- a/arch/loongarch/kernel/acpi.c +++ b/arch/loongarch/kernel/acpi.c @@ -289,7 +289,7 @@ void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size) memblock_reserve(addr, size); } -#ifdef CONFIG_ACPI_HOTPLUG_CPU +#ifdef CONFIG_ACPI_HOTPLUG_PRESENT_CPU #include <acpi/processor.h> @@ -341,4 +341,4 @@ int acpi_unmap_cpu(int cpu) } EXPORT_SYMBOL(acpi_unmap_cpu); -#endif /* CONFIG_ACPI_HOTPLUG_CPU */ +#endif /* CONFIG_ACPI_HOTPLUG_PRESENT_CPU */ diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 133ea5f561b5..295a7a3debb6 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -60,7 +60,7 @@ config X86 # select ACPI_LEGACY_TABLES_LOOKUP if ACPI select ACPI_SYSTEM_POWER_STATES_SUPPORT if ACPI - select ACPI_HOTPLUG_CPU if ACPI_PROCESSOR && HOTPLUG_CPU + select ACPI_HOTPLUG_PRESENT_CPU if ACPI_PROCESSOR && HOTPLUG_CPU select ARCH_32BIT_OFF_T if X86_32 select ARCH_CLOCKSOURCE_INIT select ARCH_CORRECT_STACKTRACE_ON_KRETPROBE diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c index 2a0ea38955df..84dd4133754b 100644 --- a/arch/x86/kernel/acpi/boot.c +++ b/arch/x86/kernel/acpi/boot.c @@ -814,7 +814,7 @@ static void __init acpi_set_irq_model_ioapic(void) /* * ACPI based hotplug support for CPU */ -#ifdef CONFIG_ACPI_HOTPLUG_CPU +#ifdef CONFIG_ACPI_HOTPLUG_PRESENT_CPU #include <acpi/processor.h> static int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid) @@ -863,7 +863,7 @@ int acpi_unmap_cpu(int cpu) return (0); } EXPORT_SYMBOL(acpi_unmap_cpu); -#endif /* CONFIG_ACPI_HOTPLUG_CPU */ +#endif /* CONFIG_ACPI_HOTPLUG_PRESENT_CPU */ int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base) { diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig index 8456d48ba702..417f9f3077d2 100644 --- a/drivers/acpi/Kconfig +++ b/drivers/acpi/Kconfig @@ -305,7 +305,7 @@ config ACPI_IPMI To compile this driver as a module, choose M here: the module will be called as acpi_ipmi. -config ACPI_HOTPLUG_CPU +config ACPI_HOTPLUG_PRESENT_CPU bool depends on ACPI_PROCESSOR && HOTPLUG_CPU select ACPI_CONTAINER @@ -399,7 +399,7 @@ config ACPI_PCI_SLOT config ACPI_CONTAINER bool "Container and Module Devices" - default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_CPU) + default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_PRESENT_CPU) help This driver supports ACPI Container and Module devices (IDs ACPI0004, PNP0A05, and PNP0A06). diff --git a/drivers/acpi/acpi_processor.c b/drivers/acpi/acpi_processor.c index 867782bc50b0..75257fae10e7 100644 --- a/drivers/acpi/acpi_processor.c +++ b/drivers/acpi/acpi_processor.c @@ -182,7 +182,7 @@ static void __init acpi_pcc_cpufreq_init(void) {} #endif /* CONFIG_X86 */ /* Initialization */ -#ifdef CONFIG_ACPI_HOTPLUG_CPU +#ifdef CONFIG_ACPI_HOTPLUG_PRESENT_CPU static int acpi_processor_hotadd_init(struct acpi_processor *pr) { unsigned long long sta; @@ -227,7 +227,7 @@ static inline int acpi_processor_hotadd_init(struct acpi_processor *pr) { return -ENODEV; } -#endif /* CONFIG_ACPI_HOTPLUG_CPU */ +#endif /* CONFIG_ACPI_HOTPLUG_PRESENT_CPU */ static int acpi_processor_get_info(struct acpi_device *device) { @@ -461,7 +461,7 @@ static int acpi_processor_add(struct acpi_device *device, return result; } -#ifdef CONFIG_ACPI_HOTPLUG_CPU +#ifdef CONFIG_ACPI_HOTPLUG_PRESENT_CPU /* Removal */ static void acpi_processor_remove(struct acpi_device *device) { @@ -505,7 +505,7 @@ static void acpi_processor_remove(struct acpi_device *device) free_cpumask_var(pr->throttling.shared_cpu_map); kfree(pr); } -#endif /* CONFIG_ACPI_HOTPLUG_CPU */ +#endif /* CONFIG_ACPI_HOTPLUG_PRESENT_CPU */ #ifdef CONFIG_ARCH_MIGHT_HAVE_ACPI_PDC bool __init processor_physically_present(acpi_handle handle) @@ -630,7 +630,7 @@ static const struct acpi_device_id processor_device_ids[] = { static struct acpi_scan_handler processor_handler = { .ids = processor_device_ids, .attach = acpi_processor_add, -#ifdef CONFIG_ACPI_HOTPLUG_CPU +#ifdef CONFIG_ACPI_HOTPLUG_PRESENT_CPU .detach = acpi_processor_remove, #endif .hotplug = { diff --git a/include/acpi/processor.h b/include/acpi/processor.h index 94181fe9780a..fd6913370c72 100644 --- a/include/acpi/processor.h +++ b/include/acpi/processor.h @@ -465,7 +465,7 @@ extern int acpi_processor_ffh_lpi_probe(unsigned int cpu); extern int acpi_processor_ffh_lpi_enter(struct acpi_lpi_state *lpi); #endif -#ifdef CONFIG_ACPI_HOTPLUG_CPU +#ifdef CONFIG_ACPI_HOTPLUG_PRESENT_CPU extern int arch_register_cpu(int cpu); extern void arch_unregister_cpu(int cpu); #endif diff --git a/include/linux/acpi.h b/include/linux/acpi.h index a73246c3c35e..651dd43976a9 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h @@ -316,12 +316,12 @@ static inline int acpi_processor_evaluate_cst(acpi_handle handle, u32 cpu, } #endif -#ifdef CONFIG_ACPI_HOTPLUG_CPU +#ifdef CONFIG_ACPI_HOTPLUG_PRESENT_CPU /* Arch dependent functions for cpu hotplug support */ int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, u32 acpi_id, int *pcpu); int acpi_unmap_cpu(int cpu); -#endif /* CONFIG_ACPI_HOTPLUG_CPU */ +#endif /* CONFIG_ACPI_HOTPLUG_PRESENT_CPU */ #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC int acpi_get_ioapic_id(acpi_handle handle, u32 gsi_base, u64 *phys_addr); @@ -644,7 +644,7 @@ static inline u32 acpi_osc_ctx_get_cxl_control(struct acpi_osc_context *context) #define ACPI_GSB_ACCESS_ATTRIB_RAW_PROCESS 0x0000000F /* Enable _OST when all relevant hotplug operations are enabled */ -#if defined(CONFIG_ACPI_HOTPLUG_CPU) && \ +#if defined(CONFIG_ACPI_HOTPLUG_PRESENT_CPU) && \ defined(CONFIG_ACPI_HOTPLUG_MEMORY) && \ defined(CONFIG_ACPI_CONTAINER) #define ACPI_HOTPLUG_OST
The code behind ACPI_HOTPLUG_CPU allows a not-present CPU to become present. This isn't the only use of HOTPLUG_CPU. On arm64 and riscv CPUs can be taken offline as a power saving measure. On arm64 an offline CPU may be disabled by firmware, preventing it from being brought back online, but it remains present throughout. Adding code to prevent user-space trying to online these disabled CPUs needs some additional terminology. Rename the Kconfig symbol CONFIG_ACPI_HOTPLUG_PRESENT_CPU to reflect that it makes possible CPUs present. HOTPLUG_CPU is untouched as this is only about the ACPI mechanism. Signed-off-by: James Morse <james.morse@arm.com> --- arch/ia64/Kconfig | 2 +- arch/ia64/include/asm/acpi.h | 2 +- arch/ia64/kernel/acpi.c | 6 +++--- arch/ia64/kernel/setup.c | 2 +- arch/loongarch/configs/loongson3_defconfig | 2 +- arch/loongarch/kernel/acpi.c | 4 ++-- arch/x86/Kconfig | 2 +- arch/x86/kernel/acpi/boot.c | 4 ++-- drivers/acpi/Kconfig | 4 ++-- drivers/acpi/acpi_processor.c | 10 +++++----- include/acpi/processor.h | 2 +- include/linux/acpi.h | 6 +++--- 12 files changed, 23 insertions(+), 23 deletions(-)